use-immer
Immer
use-immer | Immer | |
---|---|---|
8 | 142 | |
3,731 | 26,970 | |
1.6% | 0.5% | |
3.6 | 7.1 | |
7 months ago | 1 day ago | |
TypeScript | JavaScript | |
MIT License | MIT License |
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use-immer
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A cure for React useState hell?
The use-immer package additionally provides a useImmerReducer ****function that allows you to make state transitions via direct mutation, but under the hood creates an immutable copy using Proxies in JavaScript.
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Zustand vs Jotai vs Valtio? Which state management library do you prefer created by the same team?
Apply useImmer to the top component state and the dream is complete.
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Copying the contents of an existing array to a new array
If you want to use mutating code while ensuring that the final update is immutable, I recommend checking out useImmer (and useImmerReducer) - it uses immer to track mutations and do them immutably for you.
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Handling Objects in React Component State
If you find yourself using multiple objects or in your state, it may be worth it to install a library like immer. Immer provides a proxy object, referred to as a draft, so while your code appears similar to a direct mutation of state, a copy is created under the hood when an update when immer is used.
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Writing useState for each state variable or writing usestate once and use an object
useImmer is also pretty nice too - useReducer is definitely the way if you only want specific ways to manipulate the object though (and useImmerReducer can make writing the logic for that easier too)
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How to update state of type object array with setstate hook?
Within the component itself, I used a useImmer hook for the state, as it lets me write mutating code while ensuring that the actual update is immutable - but if you're only holding your array in the useState hook, a shallow clone would work fine. js setItems(items => arrayMove([...items], ...params))
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Electron Adventures: Episode 54: Notebook state management with useImmer
React is a lot more strict, and for what we need we cannot leave the state in individual components, we need to pull it up to the App component. Making modifications to deeply nested state is a lot of nasty code, fortunately React world has a solution - immer and its hooks version useImmer.
- How to handle Immutability in React? (Immer Library to rescue)
Immer
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Comparing React state tools: Mutative vs. Immer vs. reducers
Immer is a lightweight package that simplifies working with immutable states. Immutable data structures ensure efficient data change detection, making it easier to track modifications. Additionally, they enable cost-effective cloning by sharing unchanged parts of a data tree in memory.
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Immer VS mutative - a user suggested alternative
2 projects | 25 Jan 2024
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Show HN: Cami.js – A No Build, Web Component Based Reactive Framework
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It looks like it’s mutating, but both the reducers and update() uses immer* under the hood, so we still respect immutability under the hood.
Cami supports redux devtools so you can use that for time-travel debugging too!
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* https://github.com/immerjs/immer
- Why do we need modules at all?
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Making Sense of React Server Components
I heard that immutability libraries like immer.js [0] help with this. Anyone go this way and had good success? Is this 'the way'?
[0]: https://immerjs.github.io/immer/
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How We Fixed Performance With JS Object Variable Mutation
So, that's what we built, and we built it in the most obvious way — using JavaScript Proxy objects to track mutations and reflect those changes across Appsmith’s framework. Initially things looked good — it worked, aside from a few hacks to make some data types work with map and set, and we were following the example of other projects that had similar requirements. If it was good enough for them, it should be good enough for us, right?
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The sword refers to immer, the faster and stronger immutable data js tool limu stable version released!
But is immer really the ultimate answer? The performance problem of immer is more prominent in large arrays and deep-level object scenarios. See this issue description, many authors in the community began to try to make breakthroughs, and noticed that structura and mutative, I found that it is indeed many times faster than immer as they said, but it still fails to solve the problem of both fast speed and good development experience. I will analyze the two issues in detail below.
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Ramda: A practical functional library for JavaScript programmers
I like immer for this kind of thing: https://github.com/immerjs/immer
It gives you immutable updates without getting bogged down in FP abstractions.
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Why my variable is being mutated if I make any changes to my data ?
I've always been a huge fan of immer for these case. For your code, it would simply turn into setGridData((prev) => produce(prev, draft => applyChanges(changes, draft)) but I recommend you go over their documentation to fully understand how it works
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Is there a better way to do read-only types
If you're trying to make things actually immutable, Object.freeze and deep copies can clutter things up pretty good, have you considered using something like immer? (https://immerjs.github.io/immer/)
What are some alternatives?
MobX - Simple, scalable state management.
immutability-helper - mutate a copy of data without changing the original source
zustand - 🐻 Bear necessities for state management in React
immutable-js - Immutable persistent data collections for Javascript which increase efficiency and simplicity.
xstate - Actor-based state management & orchestration for complex app logic.
redux-toolkit - The official, opinionated, batteries-included toolset for efficient Redux development
Recoil - Recoil is an experimental state management library for React apps. It provides several capabilities that are difficult to achieve with React alone, while being compatible with the newest features of React.
react-query - 🤖 Powerful asynchronous state management, server-state utilities and data fetching for TS/JS, React, Solid, Svelte and Vue. [Moved to: https://github.com/TanStack/query]
valtio - 💊 Valtio makes proxy-state simple for React and Vanilla
mori - ClojureScript's persistent data structures and supporting API from the comfort of vanilla JavaScript
redux-saga - An alternative side effect model for Redux apps